Curse of Hospitality 

Enchantment — Aura Curse
$0.37 #7965 0.49 4.8 years
Enchant player
Creatures attacking enchanted player have trample.
Whenever a creature deals combat damage to enchanted player, that player exiles the top card of their library. Until end of turn, that creature's controller may play that card and they may spend mana as though it were mana of any color to cast that spell.
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Cards similar to Curse of Hospitality expected a card that isn't here?
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Gonti, Night Minister86%
$0.79↑#2503↑0.481.6 years↓
"Whenever a creature deals combat damage to one of your opponents, its controller looks at the top card of that opponent's library and exiles it face down. They may play that card for as long as it remains exiled. Mana of any type can be spent to cast a spell this way."
Dream-Thief's Bandana86%
$1.69↑#6366↑0.67↑2.4 years↓
"Whenever equipped creature deals combat damage to a player, look at the top card of their library, then exile it face down. For as long as it remains exiled, you may play it, and mana of any type can be spent to cast that spell."
Predators' Hour85%
$0.35↓#75100.38↓4.8 years
"Until end of turn, creatures you control gain menace and "Whenever this creature deals combat damage to a player, exile the top card of that player's library face down. You may look at and play that card for as long as it remains exiled, and you may spend mana as though it were mana of any color to cast that spell.""
Cunning Rhetoric84%
$2.19↑#2624↑0.36↓5.4 years
"Whenever an opponent attacks you and/or one or more planeswalkers you control, exile the top card of that player's library. You may play that card for as long as it remains exiled, and you may spend mana as though it were mana of any color to cast it."
Breeches, Brazen Plunderer84%
$0.24↓#4616↑0.23↓5.8 years
"Whenever one or more Pirates you control deal damage to your opponents, exile the top card of each of those opponents' libraries. You may play those cards this turn, and you may spend mana as though it were mana of any color to cast those spells."
Gonti, Canny Acquisitor84%
$1.57↑#81110.592.4 years↓
"Whenever one or more creatures you control deal combat damage to a player, look at the top card of that player's library, then exile it face down. You may play that card for as long as it remains exiled, and mana of any type can be spent to cast that spell."
Knacksaw Clique84%
$3.35↑#17338↓0.20↓18.3 years↑
"
,
: Target opponent exiles the top card of their library. Until end of turn, you may play that card."
Grenzo, Havoc Raiser83%
$0.28↓#1641↑0.35↓10.0 years↑
"• Exile the top card of that player's library. Until end of turn, you may cast that card and you may spend mana as though it were mana of any color to cast that spell."
Rogue Class83%
$1.57↑#5649↑0.30↓5.1 years
"Whenever a creature you control deals combat damage to a player, exile the top card of that player's library face down. You may look at it for as long as it remains exiled."
Ornate Kanzashi82%
$0.34↓#26616↓0.05↓21.6 years↑
"
,
: Target opponent exiles the top card of their library. You may play that card this turn."
Stolen Strategy81%
$0.34↓#4563↑0.65↑8.2 years↑
"At the beginning of your upkeep, exile the top card of each opponent's library. Until end of turn, you may cast spells from among those exiled cards, and you may spend mana as though it were mana of any color to cast those spells."
Outrageous Robbery81%
$0.38↑#4711↑0.402.6 years↓
"Target opponent exiles the top X cards of their library face down. You may look at and play those cards for as long as they remain exiled. If you cast a spell this way, you may spend mana as though it were mana of any type to cast it."
Fallen Shinobi80%
$6.62↑#2059↑0.487.2 years↑
"Whenever this creature deals combat damage to a player, that player exiles the top two cards of their library. Until end of turn, you may play those cards without paying their mana costs."
You Find Some Prisoners80%
$0.18↓#4434↑0.21↓5.1 years
"• Interrogate Them — Exile the top three cards of target opponent's library. Choose one of them. Until the end of your next turn, you may play that card, and you may spend mana as though it were mana of any color to cast it."
Nightveil Specter80%
$0.52↑#87610.88↑13.6 years↑
"Whenever this creature deals combat damage to a player, that player exiles the top card of their library."
Rev, Tithe Extractor80%
$21.22↑#2337↑0.67↑1.8 years↓
"Whenever one or more creatures you control deal combat damage to a player, create a Treasure token, then look at the top card of that player's library and exile it face down. You may cast that card for as long as it remains exiled."
Korvold and the Noble Thief79%
$0.27↓#11922↓0.533.0 years↓
"Exile the top three cards of target opponent's library. You may play those cards this turn."
Brainstealer Dragon78%
$8.42↑#2207↑0.484.2 years
"At the beginning of your end step, exile the top card of each opponent's library. You may play those cards for as long as they remain exiled. If you cast a spell this way, you may spend mana as though it were mana of any color to cast it."
Mind's Dilation78%
$0.40↑#2656↑0.76↑10.1 years↑
"Whenever an opponent casts their first spell each turn, that player exiles the top card of their library. If it's a nonland card, you may cast it without paying its mana cost."